First summarization utilities, helpful for debugging

In order to better test these classes, or as a framework for summarizing results anyway,
we create a class to iterate through files and gather statistics. Exceptions or results
are reported back on standard out after running
Added sense summarizer
Added PropSummarizer

Also changed doNext parameter name to idx instead of blockIdx, since not all formats are blocks
Expanded SenseSummarization output slightly
Added EnamexSummarizer

The ENAMEX format still deserves more attention, as character positions are not calculated correctly,
and token positions are not calculated at all.
EnamexIterator now tries to put file/sentence information in annotations

These bits of information are pulled from ignored lines, which are also accessible to users of the iterator